Composition of matter.



pinata ens arena no VINCENZO LOGRASSO, OF NEW YORK, N. Y.

COMPOSITION OF MATTER.

No Drawing.

To all whom it may concern.

Be it known that I, Vmomvzo LoeRAsso, a citizen of the United States, and a resident of the city of New York, in the county and State of New York, have invented a certain new and useful Composition of Matter, of which the following is a specification.

This invention relates to preparations or solutions for the preliminary treatment of the surfaces of metal bodies which are designed to be joined together by soldering. It is well known that in order to make the soldering operation effective, the surfaces to be joined must be clean-that is to say, must be free of foreign matter, such as paint and the ordinary incrustation thereon of fine substances carried through the atmosphere and deposited thereon, particularly if organic in character.

Heretofore, so far as I am aware, it has been the practice, particularly in connection with work in the nature of repair work, to first carefully scrape the surfaces which are designed to be joined with a comparatively sharp-edged implement, and then apply thereto an acid-usually muriatio acidwhich permits of the subsequent application of the solder to practically pure metal surfaces. This cleaning operation requires time and is otherwise unduly expensive, and the principal object of this invention is the provision of a composition of matter,in liquid form, which will be comparatively cheap in cost, which may be easily and readily applied to the surfaces to be joined, and which will substantially instantaneously prepare them for the soldering operation.

I have found that the presence of comparatively small quantities of some kinds of inorganic solid foreign matter is not objectionable, in case it can be caused to adhere more or less firmly to the surface upon Which it has been deposited, and the present invention therefore contemplates a solution which will to the maximum extent dissolve the organic matter and at least loosen certain kinds of inorganic matter, removing both in a manner which may be. termed automatic in the process of application of the solution, and causing the unobjection able forms of foreign matter to adhere to the surface to which the solution has been applied. For these purposes, I have found,

' after many experiments, that if I add to about four ounces of chlorid of zinc, about an ordinary teaspoonful of commercial Specification of Letters Patent. t t 11915, Application filed June 24, 1915. Serial No. 36,071.

borax and a like amount of commercial boric acid, and after thoroughly mixing the same add the mixture to about one gallon of water in which these ingredients are thoroughly dissolved, I have provided a solution which, upon application in any useful manner to metal surfaces which are designed to be joined together by soldering, will accomplish the results hereinbefore set forth.

I am aware that both chlorid of zinc and borax and other compounds having a. boric base have been employed by tinsmiths, plumbers, and other artisans in this art, individually, but I am not aware that the particular combination of these elements has even been even attempted for the purpose herein set forth.

I am unable to state authoritatively the exact chemical action of each of the ingredients in my compound, but I do know that my compound will accomplish the desired result. So far as I am aware the chlorid of zinc combined with borax acts as a solvent to dissolve the organic matter and loosen the objectionable insoluble matter whereby both may be removed in the process of application of the compound, and that the boric acid acts as a binder to retain the normally solid ingredients in solution. I have produced fairly satisfactory results from the use of borax along in combination with the chlorid of zinc, and less satisfactory results from the use of the boric acid along in combination with the chlorid of zinc, but for best results it would seem the use of both borax and boric acid in substantially the proportions set forth, is essential.

After having prepared my solution, as above described, the same may be made the subject of immediate use or may be suitably packaged for the market, and in this connection I desire to suggest that it is not desirable for obvious reasons to either package or prepare my solution in metal containers. V

I might further suggest that I have not found it necessary to exercise an extraordinary degree of care in proportioning my ingredients, but I am sure the best results will be obtained from a compound which includes these ingredients in approximately the proportions set forth.

Having thus described my invention I claim as new and desire to secure by Letters Patent;

1. As a new composition of matter, chlorid of zinc, borax'a'nol boric acid; dissolved in- In testimony of the foregoing, I have Water," as and for the purpose set forth. hereunto set my hand in the presence of two 10 2. As a new compositionof matter, chlorid subscribing Witnesses. of zinc in the proportion of approximately VINCENZO LOGRASSO' four ounces, borax and boric acidin thepro portions of about one teaspoonful each, and Witnesses:

Wateri-n the proportion ofabout one gallon, G'Eo; PLACE,

as and for the purpose set forth. HARRY FINIZIO.

Copies of this patent inay be obtained for five cents each, by addressing the Commissioner of Patents,

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